jtBaseApp/node_modules/@cesium/engine/Source/Shaders/Builtin/Functions/readDepth.js

//This file is automatically rebuilt by the Cesium build process.
export default "float czm_readDepth(sampler2D depthTexture, vec2 texCoords)\n\
{\n\
    return czm_reverseLogDepth(texture(depthTexture, texCoords).r);\n\
}\n\
";